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#173FA4

#173fa4 ≈ Cobalt Blue

  • blue
  • Lightness: low
  • Saturation: strong
  • Cool
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#173fa4 is a color from the blue family, with low lightness and strong saturation. In the RGB model it is made of 9.02% red, 24.71% green and 64.31% blue; printed in CMYK it uses 85.98% cyan, 61.59% magenta, 0% yellow and 35.69% black. Its hue angle is 222.98°, with 75.4% saturation and 36.67% lightness in HSL. It is a cool color, often associated with trust, stability and focus. Designers typically use it for technology products, finance and banking and brand accents. White text on this color reaches a contrast ratio of 9.2:1 (WCAG AAA). The closest named color is Cobalt Blue (#0047ab), ΔE 3.13.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#003399
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0642

Complementary

  1. #173fa4
  2. #a47c17

Split complementary

  1. #173fa4
  2. #a43617
  3. #86a417

Analogous

  1. #1786a4
  2. #173fa4
  3. #3617a4

Triadic

  1. #173fa4
  2. #a4173f
  3. #3fa417

Tetradic

  1. #173fa4
  2. #7c17a4
  3. #a47c17
  4. #3fa417

Square

  1. #173fa4
  2. #a41786
  3. #a47c17
  4. #17a436

Monochromatic

  1. #040b1e
  2. #0e2561
  3. #173fa4
  4. #275ce1
  5. #6a8eea

Shades

#173fa4 mixed progressively with black.

  1. #173fa4
  2. #153994
  3. #123283
  4. #102c73
  5. #0e2662
  6. #0c2052
  7. #091942
  8. #071331
  9. #050d21
  10. #020610
  11. #000000

Tints

#173fa4 mixed progressively with white.

  1. #173fa4
  2. #2e52ad
  3. #4565b6
  4. #5d79bf
  5. #748cc8
  6. #8b9fd2
  7. #a2b2db
  8. #b9c5e4
  9. #d1d9ed
  10. #e8ecf6
  11. #ffffff

Tones

#173fa4 mixed progressively with gray.

  1. #173fa4
  2. #2246a0
  3. #2c4c9d
  4. #375399
  5. #415996
  6. #4c6092
  7. #56668e
  8. #616d8b
  9. #6b7387
  10. #767a84
  11. #808080

Readable text 9.2:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 2.28:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #484848 ≈ 0.003% of males
Achromatomaly #3a4478 ≈ 0.001% of males
Protanopia #004ea7 ≈ 1.01% of males
Deuteranopia #0041a2 ≈ 1.27% of males
Tritanopia #00596b ≈ 0.0001% of males
Protanomaly #0049a6 ≈ 1.08% of males
Deuteranomaly #0040a3 ≈ 4.63% of males
Tritanomaly #005086 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-173fa4 {
  color: #173fa4;
}
Background
.bg-173fa4 {
  background-color: #173fa4;
  color: #ffffff;
}
Border
.border-173fa4 {
  border: 2px solid #173fa4;
}
CSS variables
:root {
  --color-primary: #173fa4;
  --color-primary-rgb: 23 63 164;
  --color-primary-hsl: 223 75% 37%;
}
Gradient
.gradient-173fa4 {
  background: linear-gradient(135deg, #173fa4, #3617a4);
}
Colored shadow
.shadow-173fa4 {
  box-shadow: 0 8px 24px rgb(23 63 164 / 0.35);
}

#0047ab Cobalt Blue ΔE 3.13 #1034a6 Egyptian Blue ΔE 3.51 #003399 Smalt ΔE 3.74 #1c39bb Persian Blue ΔE 4.25 #0f52ba Sapphire ΔE 6.63 #0f4d92 Yale Blue ΔE 6.74 #4f42b5 Ocean Blue ΔE 7.47 #e8c05b Inverted #484848 Grayscale 

Cobalt Blue
#173fa4  rgb(23, 63, 164)  hsl(223, 75%, 37%)  Cobalt Blue
#a47c17  rgb(164, 124, 23)  hsl(43, 75%, 37%)  Dark Goldenrod
#a4173f  rgb(164, 23, 63)  hsl(343, 75%, 37%)  Vivid Burgundy
#3fa417  rgb(63, 164, 23)  hsl(103, 75%, 37%)  Kelly Green